Document and Entity Information - shares
6 Months Ended
Jul. 03, 2018
Aug. 06, 2018
Document And Entity Information [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Jul. 03, 2018  
Document Fiscal Year Focus 2018  
Document Fiscal Period Focus Q2  
Entity Registrant Name JAMBA, INC.  
Entity Central Index Key 0001316898  
Current Fiscal Year End Date --01-01  
Entity Filer Category Accelerated Filer  
Trading Symbol JMBA  
Entity Common Stock, Shares Outstanding   15,640,617